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P6KE51A-T Equivalent & Substitute Parts
Part Overview
The P6KE51A-T is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection applications. This unidirectional zener diode operates with a reverse standoff voltage of 43.6V and provides clamping at 70.1V with peak pulse current handling of 8.6A. The component is packaged in DO-15 (DO-204AC) axial configuration for through-hole mounting.
The P6KE51A-T carries an Obsolete product status. Identifying functionally equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications requiring this voltage suppression specification.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 43.6 | V |
| Voltage - Breakdown (Min) | 48.5 | V |
| Voltage - Clamping (Max) @ Ipp | 70.1 | V |
| Current - Peak Pulse (10/1000µs) | 8.6 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -55 to 175 | °C (TJ) |
| Mounting Type | Through Hole | — |
| Package / Case | DO-204AC, DO-15, Axial | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution eligibility for the P6KE51A-T is determined by strict equivalence across the following critical parameters:
- Voltage - Reverse Standoff (Typ): 43.6V
- Voltage - Breakdown (Min): 48.5V minimum
- Voltage - Clamping (Max) @ Ipp: 70.1V
- Current - Peak Pulse (10/1000µs): 8.6A minimum
- Power - Peak Pulse: 600W
- Type: Zener, Unidirectional
- Mounting Type: Through Hole
- Package / Case: DO-204AC, DO-15, or Axial equivalent
Substitute parts must maintain identical electrical performance within these specifications. Package variants (Cut Tape, Tape & Reel, Bulk) and manufacturer differences do not affect functional substitutability provided all electrical parameters remain within specification.
Parameter Comparison
| Part Number | Manufacturer | Vwm (V) | Vbr (V) | Vc (V) | Ipp (A) | Ppk (W) | Temp Range (°C) | Package | Status |
|---|---|---|---|---|---|---|---|---|---|
| P6KE51A-T | Diodes Incorporated | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 175 | DO-15 | Obsolete |
| P6KE51A | Fairchild Semiconductor | 43.6 | 48.5 | 70.1 | 8.6 | 600 | — | — | Active |
| P6KE51A-AP | Micro Commercial Co | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 175 | DO-15 | Active |
| P6KE51A-BP | Micro Commercial Co | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 175 | DO-15 | Active |
| P6KE51A-E3/54 | Vishay General Semiconductor - Diodes Division | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 175 | DO-204AC | Active |
| P6KE51A-G | Comchip Technology | 43.6 | 48.45 | 70.1 | 8.56 | 600 | -55 to 150 | DO-15 | Active |
| P6KE51A-TP | Micro Commercial Co | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 175 | DO-15 | Active |
| P6KE51AE3/TR13 | Microsemi Corporation | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -65 to 150 | Axial | Active |
| P6KE51AHE3/54 | Vishay General Semiconductor - Diodes Division | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 175 | DO-204AC | Active |
| P6KE51AHE3/73 | Vishay General Semiconductor - Diodes Division | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 175 | DO-204AC | Active |
Engineering Selection Recommendations
All listed substitute parts maintain electrical equivalence to the P6KE51A-T across voltage, current, and power specifications. Selection among active alternatives should prioritize the following factors:
Product Status & Availability: All substitute parts carry Active product status, ensuring ongoing manufacturing and supply chain support. The P6KE51A-T's Obsolete designation makes transition to an active equivalent necessary for new production.
Compliance & Certification: P6KE51AHE3/54 and P6KE51AHE3/73 (Vishay TransZorb® series) include AEC-Q101 automotive qualification and are graded for automotive applications. These variants are suitable for designs requiring automotive-grade reliability. All listed parts maintain ROHS3 compliance and REACH compliance status as specified.
Temperature Operating Range: P6KE51A-TP, P6KE51A-AP, P6KE51A-BP, P6KE51A-E3/54, P6KE51AHE3/54, and P6KE51AHE3/73 support the full -55°C to 175°C operating range matching the original P6KE51A-T. P6KE51A-G and P6KE51AE3/TR13 operate to 150°C maximum junction temperature, suitable for applications not requiring the full upper temperature range.
Package Compatibility: DO-15 and DO-204AC packages are mechanically and electrically interchangeable for through-hole applications. Axial package variants (P6KE51AE3/TR13) provide equivalent electrical performance with alternative lead configuration.
Frequently Asked Questions (FAQ)
Q: Can I substitute P6KE51A-T with any of the listed parts?
A: Yes, all listed parts meet the electrical specification requirements (43.6V standoff, 70.1V clamping, 8.6A peak pulse current, 600W peak power). Selection depends on availability, packaging preference, and temperature range requirements for your specific application.
Q: What is the difference between DO-15 and DO-204AC packages?
A: DO-15 and DO-204AC are equivalent designations for the same axial through-hole package. Both accommodate identical component dimensions and lead spacing. Package designation varies by manufacturer convention but does not affect electrical performance or mechanical fit.
Q: Are Vishay TransZorb® parts (P6KE51AHE3/54, P6KE51AHE3/73) better than other manufacturers?
A: Vishay TransZorb® variants include AEC-Q101 automotive qualification, making them suitable for automotive-grade applications. For general-purpose applications, all listed parts provide equivalent electrical performance. Selection should be based on application requirements and supply availability.
Q: Why does P6KE51A-G show slightly different electrical parameters?
A: P6KE51A-G (Comchip Technology) specifies 8.56A peak pulse current and 48.45V minimum breakdown voltage, both within acceptable tolerance of the 8.6A and 48.5V specification. The maximum operating temperature is 150°C versus 175°C for other variants. This part is suitable for applications not requiring the extended upper temperature range.
Q: What is the difference between Cut Tape (CT), Tape & Reel (TR), and Bulk packaging?
A: Packaging format affects order quantity and handling but does not alter electrical or mechanical specifications. Cut Tape provides individual component strips, Tape & Reel provides continuous reels for automated assembly, and Bulk provides loose components. Select based on production volume and assembly process requirements.
Q: Can I use P6KE51AE3/TR13 (Axial package) as a direct replacement?
A: P6KE51AE3/TR13 provides identical electrical performance and through-hole mounting compatibility. The axial lead configuration differs from DO-15 radial leads. Verify PCB layout accommodates axial lead spacing before substitution.
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